Ventilated line insulator



'Mar. 6, 1923. 1,447,359.

' L. STEINBERGER.

VENTILATED LINE INSULATOR.

men NOV. 26, 1918.

wlmsss S INVENTAOR u MU [NZ v Q (A-@5770 y' Patented Mar. 6, 1923.

UNITED STATES LOUIS STEINBERGER, OF BROOKLYN, NEW YORK.

VENTILATED LINE INSULATOR.

Application filed No ember 26, 1918. Serial No. 264,150.

To all whom it may concern:

Be it known that I, LOUIS STEINBERGER,

a citizen of the United States, and a resident of the borough of Brooklyn, city and State of New York, have invented certain new and useful Improvements in Ventilated Line Insulators, of which the following is a specification.

The invention relates to pin type line insulators and one of the objects of which is to provide means for cooling and ventilating the insulator body at a point where it would be most apt to become heated when in service.

Another object of the invention is'to provide means for ventilating the insulator at a point substantially midway between the position of the supporting pin and the position of the line when the insulator is in service.

Another object of the invention is to provide a ventilating means for the insulator body as above stated, and in so doing to pro vide a construction by means of which Water caused by the collection of rain, snow, etc., ma readily drain therefrom.

(d ther objects will appear from the following specification and claims.

Referring to the drawings:

Fig. 1 is a vertical section of my improved pintype insulator embodying one form of my. invention.

Fig. 2 is a side elevation thereof.

Fig. 3 is a horizontal section on line 33 of the construction shown in Fig. 1.

Fig. 4-. is a view similar to ig. 3 of a modified form of m invention.

The insulator b0 y may be formed from any suitable insulating material but I prefer to use that material known in the art as electrose, though it may be formed from porcelain, glass or other fireproof insulating material.

The invention is embodied in a pin type line insulator which may be of any suitable shape for use as a pin type line insulator, that shown in the drawing being one of the many shapes. into which my insulator body may be molded or formed.

As shown, the insulator body A is'provided with a cavity 10 in the underside thereof with screw threads 11 formed in the wall thereof for the reception of the usual supporting pin (not shown). At the upper portion of the insulator is the usual groove or channel 12 to form a seat for the reception of the line wire (not shown) and a groove or channel 13 into which the tie Wire (not shown) is fitted to hold the line wire in place upon the insulator.

In the type of insulator as shown, when in service, the generated heat will be at its maximum at a point substantially midway between the point a at the bottom of the seat for the line wire and the point I; at the bottom of the cavity for the reception of the supporting pin; in other words, substantially midway between the support or ground and the line.

When theinsulator in service becomes so heatedthe insulating material deteriorates and becomes weaker and consequently has, less insulating value. The insulating body efliclency deteriorates not only as to its dielectric properties but as to its mechanical properties as well.

To overcome these disadvantages I provide "entilating conduits or tunnels which pass through the insulator body in a horizontal plane and at a point substantially midway between. the line wire and the support so that the insulator will be cooled at that point when it is apt to become heated in service. The ventilating or cooling of the insulator prolongs the life of the same as 86 will be clearly understood. These conduits or tunnels may be of any chosen shape and may be of any number, one or more, provided the number is not so excessive as to substantially weaken the mechanical structure of 90 the insulator.

In carrying out my invention I prefer to provide two conduits or tunnels 20 and 21, though as above stated, I may provide either a single tunnel or more than two.- These conduits or tunnels are situated in substantially the same horizontal plane and are substantially at right angles to each other, crossing each other at the center or axis of the insulator body and they may be of any form or shape but I find it etlicient to flare the mouths or openings thereof at 22 and 23,

2a and 25. the bottom of each conduit or tun nel inclining downwardly from the center so that the rain, snow or moisture which may be collected in the mouth of the tunnel will drain therefrom.

In forming these tunnels the top surface is preferably straight and the bottom sur-' face is at an incline, extending outwardly enace and downwardly from a common center as shown.

By means of the above described construction it provide an insulator which is cooled by ventilation at the point where the heat develops when in service and the life of such an improved insulator is consequently prolonged.

In Fig. a l have shown a modified construction in which the conduits or tunnels 20 and 21. are lined with metal tubes 30 and 31. lln addition to the ventilation and cooling functions of the conduits or tunnels the metal tubes or linings act as stress distributors for the purpose of distributing the static stresses which are set up within the body of the insulator more especially at the upper point'of the supporting pin, in other words, at a pointbetween the line and the ground.

As changes of construction could be made within the scope of my invention, it is intended that all matter contained in the above description or shown in the accompanymg drawings shall be interpreted as illustrative and not in a limiting sense.

Having now described my invention what ll claim as new and desire to secure by Letters Patent is:

l. lln a pin type line insulator provided with 'a plurality of conduits crossing at angles to each other, the said conduits being approximately in the same plane situated substantially midway between the line and the support.

2. In a pin type line insulator provided with'ap plurality of conduits crossing at right angles to each other, the said conduits being-approximately in the same plane,

metal linings for said conduits situated substantially midway between the line and the support.

3. In a pin type line insulator provided with a plurality of conduits crossing at right angles to each other, the lower surfaces only of each of the conduits tapering downwardly from a common center to the exterior of the insulating body.

4. A pin type line insulator provided with conduits extending to the outside surface thereof from a common point substantially midway between the line and the support, the upper walls of said conduits extending outwardly inv a horizontal plane and the lower walls of said conduits flaring outwardly and downwardly from the center to the surface of said insulator.

5. In a pin type insulator, a body of insulating material provided with an annular flange situated between the ends of the insulator body, the upper surface of said flange sloping downwardly, conduits extending to the outside surface of the flange from a common point substantially midway be,-

tween the line and support, the upper surfaces of the conduits lying in the same horizontal plane and the lower surfaces only of each of the conduits tapering downwardly from a common center to the exterior of the flange, the lower surfaces being substantially longer than and projecting beyond the outer extremities of the upper walls of the conduits. v

In witness whereof, l have hereunto set my hand at the borough of Manhattan, city and State of New York, this 19th day of November, 1918.

LOUIS STEINBERGER. In presence of- ZITA M. GRAHAM. 

